What isotope symbol can be represented by, 7p+,7e, 7n0?

N¹⁴

Explanation:

Each element has its own properties, and those properties can be seen by their atomic number and proton number. However, there are types of atoms called isotopes, and these atoms have a different number of neutrons compared to its standard atom. For example, the standard atom of carbon is carbon-12, however, there are isotopes of carbon that have more neutrons, making them heavier. Examples of such isotopes are carbon-13 and carbon-14.

In this question, we are looking for an atom with has 7 protons and 7 electrons. Scanning the periodic table of elements, we can see that nitrogen is the only atom with 7 protons, hence in a neutral atom of nitrogen, there are 7 protons and 7 electrons. The atomic mass can be calculated by adding the number of protons and the number of neutrons together, so the atomic mass for this isotope is:

Protons + Neutrons = Atomic Mass

= 7 + 7

= 14

The isotope represented by 7p + 7e-, 7n0 is nitrogen-14 (N¹⁴).